Remove hardcoded project path in .gitlab-ci.yml

We remove the first component from $CI_PROJECT_PATH because that one is
used as the pages.tpn subdomain.
2 jobs for main in 3 minutes and 40 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Test
passed pages #32792

00:03:40

 
  Deploy
passed pages:deploy

00:00:04